California Water Service Group (NYSE: CWT) is a publicly traded holding company that provides regulated water utility services through its subsidiaries. The company delivers safe, reliable drinking water and wastewater management to residential, commercial, industrial and municipal customers across California, Hawaii and New Mexico. Its principal operating units include California Water Service, New Mexico Water Service and Hawaii Water Service, each responsible for end‐to‐end water supply operations—from source development and treatment to distribution and customer service.
Founded in 1926 as the California Water Service Company, the group has grown to become one of the largest investor‐owned water utilities in the United States by customer count. Headquartered in San Jose, California, CWT serves nearly half a million service connections across urban, suburban and rural communities. The company’s infrastructure portfolio comprises treatment plants, reservoirs, wells, pumping stations and an extensive pipeline network, all maintained to meet rigorous health, safety and environmental regulations.
California Water Service Group emphasizes sustainability, water conservation and community engagement as core elements of its strategy. It invests in advanced metering infrastructure and leak detection systems to optimize resource management, and develops drought‐resilient supply projects to enhance system reliability. The company also offers customer education programs and affordability initiatives designed to support low‐income households. Guided by an experienced board and executive team, CWT focuses on long‐term asset management, regulatory compliance and operational excellence to serve the evolving needs of its service territories.
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